Suppose you begin sliding down a 15 degree ski slope. Ignoring air resistance, how fast will you be moving after 10s?
I need help setting it up. Any guidance will be appreciated. Thanks!
Suppose you begin sliding down a 15 degree ski slope. Ignoring air resistance, how fast will you be moving after 10s?
I need help setting it up. Any guidance will be appreciated. Thanks!
Remember that F=ma. Here F is the force of gravity along a 15 degree incline. If you resolve the force of gravity into components along the slope and perpendicular to the slope, you should be able to see that here F = mg sin(15 deg). So now you can determine its acceleration a. The next step is to apply the equation of motion for a body under constant acceleration to find its velocity at t=10 sec.
Do you want an answer that also ignores friction as well as air resistance?
He is going fast likely out of fear. Ask/tell him to slow down and try to give more examples and visuals. I supervise first year science teachers who graduate from our university with a type 25 teaching certificate. Its very common for them to go too fast, ask for more examples.
I suppose you can ignore force if you simply assume that the acceleration along the slope is a = g sin(15 degrees). Here g is the acceleration due to gravity, or 9.8 m/s^2. From this you can determine the velocity after 10 seconds.
Half of us graduated in the top half of our class, the rest did not.
9.8m/s*sin(15) *10
25m/s
a=+gsin theta
a=9.8(sin 15)
a=2.54m/s^2
however a= change in velocity/time
velocity=a*time
2.54*10= 25.4m/s
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